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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56e29b33a357d47acd040ba9e7226ccade2fc0223be26efcc1c7ba2130e5b098' 
  AND token = '6Hmauat380QF9AxbArmGUcUo3rubNp7cU2XY3ahKuuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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