Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '425930868faf64f4ecb3d38a2fad6e51c2593591fd8e8ecbadc482079fcdf5cb' 
  AND token = 'kAKtcAp9gA0APBAF7wDOoNOudyw1RtO8nnql+XQvrdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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