Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96fa713746f91e7b9eba8f7de9c0eed3965e278628688c1bbe7a33f0ed13df1e' 
  AND token = 'VhUCpmEdPJIHt+du2E8G0sEeb42hfO4zgF/6huaX7+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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