Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90a2c9165923c5edf344de0fae769db477f0fbfbc6d8bc05103c781ee524c789' 
  AND token = '8EH5J5oISdk1fhDeugP9QLpn+LLFmWEZeNBIL8fPD+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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