Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b488112ac335a45c5b4bc952a8d95573c7fab9854b0039a1f85e33c0b4721af' 
  AND token = '6cOB5jNjhrO6rcEjILRSm5dOchG8ou60yjyc7DOLbVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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