Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ba123e6f0a44b51004670893b8a29256cea6e808cd3a2ee4695620879bf3b84' 
  AND token = 'jJ6dI37fagW66yph/D5kMw81bVHRMSdEiiI2Uc12yVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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