Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf3b32b87042209446fab4b10302fffad54ec851ca4cd32d8fed19dfa0113114' 
  AND token = 'qSIoXI4PZA6Ij0OPoLA/cj1kXjiuKeSm6KDaQMy8Fos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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