Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ac053b334255cb8a4d015efb523cb42da332dbd8f5f128f6828cafa9c5799d7' 
  AND token = '08+cermFQKnM9serNEuuKhy8XXPwn7bs7d7D/Rasf/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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