Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'af5a2027bbc543557a856072c1204d7ab1156b7fddc0e4ad4f475a8a41d90080' 
  AND token = 't40z5roUWHEejlq9NaUW1HJd7P9bnBJUBQFYGWwnCGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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