Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd45bcd8603d71d17b14f69c069de6cd8d39dc533d5eed6b03d8ec3230ebbd56' 
  AND token = '7xwXixB8rq2lNw9KHVG4Bw3pr1usl4yRNLOSf8pKvJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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