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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '808fcdec610defa07ff4fea56375c6f16a0ea302c85a06a838f4158f07149ccd' 
  AND token = 'BIvs9aNKzDWZPNQyck5HDJYEc57f0kxlKY9nuvq0HY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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