Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37d5bfe1a5ceb55f0670b026e9f24080e073929ad8547d748c824b1f6394de5c' 
  AND token = '+Kh2vKEcynFQrU3yt0b3apky1VApQcmJ5Ec6pM0A0gA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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