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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c25b7c4f19f1fce2f8f0590c32c26d6e4ed370edd5ef862749945695095402e0' 
  AND token = 'ubjqv5SO3RoLF9Nm12LBoBSYrFFlmnqtf+B5AA6NYHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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