SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f95584eae55e7dbba5c8458527af148fcebc2a53b3e3cd9e7d6630a23fbb88e8' 
  AND token = 'EBKR40pXTzGbyV6kJzP+iJYJ0N3i71LUCo6m/I9qDHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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