Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47b9467fff50bd3215fccd3b3c9f4f24203ce1d8507447a603f2a2bb3e89ef31' 
  AND token = 'j7VqcjDxuxmtLDqmyDq5SYeSAzvFfqECsb1mYyjn04c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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