Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c52d662718302e37880ef7812a4e4c73642826a5d0450734e582a1b76f5228d' 
  AND token = 'Mr5GtvAAD68dIZN+dOpqdyp4QMy8PJax0YV+gk8F+8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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