SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9428d014b4971eb2049aec339ad527f51cbb5eea9391270563286a4ea3f559b5' 
  AND token = 'y9gWGhKF1Q+BHsjYuWL8hJE3qQiF8Yqqz1yusQgLnPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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