Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9684d19ac97f99232d1b016ce9e52eb3c03c29d7c2704eac962b37206af9bddf' 
  AND token = '4ySlxsFT7WTtmUHo2NtYgPMjROQufs1hS7pufPUkzOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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