Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bec8a6853492e7a5b5a0f51f1b402e3a5e1610ce34eafc0c6eb05263952419da' 
  AND token = 'oHFVSFoV9fZ695FlMLmsD1csfRXaF2fHEtXisIZhPxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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