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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6729abaf60191504dc9d22c03389d8242f1e61a84e23a8edc683e0e49831e27' 
  AND token = '/eOMU5L6lPYclclLBH+zz8IAz7oVV0aH2ZvnffaBcw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}