SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee9042c5a42f352a5eb836e51cfca04bab7afb9ea1dcd67247e6d6472c594ad8' 
  AND token = 'V2DDzQXItdjwOvHnM6hL86Z5JSw0QFcDzy+3x6Wf9BE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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