Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7728f219e374209b5b4370c4a4b53058da6d00ce927fb37b6320bfab86eb7dff' 
  AND token = 'ayJVD5pHUnh7HTiHPpMmXHzgkRWor2/TPHa6SgPGw5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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