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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c72665e55295a9d6f1543611641770ba6545139e399593fa9bf8a6722622854' 
  AND token = 'mYcbfE1r1utdekgH7685RJwmkMiPeGMrTpGONMwfhuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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