Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a01e3686ccc76cf5c80dec709dc13e36b02a0d070c6339306c01163f170ef85' 
  AND token = 'R9ykEhrW5sae88uHpR3YSZ1ULw+zlXjIQM7UX1MT8XI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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