Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5350a01010235128353162fd50d66eff48acf13387c7db0e4ab5285a27484e7' 
  AND token = 'dI0m/2Kj2YBYjrjLmcKdhvCie+C1excgapItlrh8boY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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