SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07416ecd67d615320415e6b256b22f17b63414eb2607c34bd648ae0f3a541d24' 
  AND token = 'wEqpSg7JPzt2x9F9su1hS/gXY5amBYZOW63ozKFYD2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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