SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66f3f7429065d23a0761c7e80a9311686e8ab459d661b3adef95738a3abf7dbe' 
  AND token = 'G2PB13f2GjG+vCv0Tcgyp7gR0wD4YzZAmHo68qzNeB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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