Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19d236478346f84758fe0c1e4c178a1a1bcd0b44cd6cc68bd2ba014191ec1d6c' 
  AND token = 'OZ4q87pk7tQ8Vxb/Xb1Er0LUMVbDS1bghfg04QEb5dA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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