Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d95de3fd0db6e05349464e8b6076c98ed6798e945214ed262f05003bcfe4cfc' 
  AND token = 'GvBXObxXcDnDAhBQjlShK4McTWmOsJH8xz7F3MRBL5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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