Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba7b9e242591e3bd9aa9245951c63090413673f0ddcacd51ce0403bc2f2cd037' 
  AND token = '51w48XMIrBv3APyid9JnOs8jBCKWdV42pLEUVuOcAkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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