Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5bf18930e9a74745b662b9a03d5fc5711e15a524609ae9db36633d50eea0923' 
  AND token = 'VtWjSxaVPTWU36V1LXkk7fXMuXz5N6wt/IF2haAk0D4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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