Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba8cad7bd999769f7edd023ca3ba370f3c3d31d5b6562e6e1e73cb9c31fe0ac8' 
  AND token = 'IQ/Dmpg6ZZLn58QXRSxBophGrchYSg0S1ck9BkAFDkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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