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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63c2bb215be0a46d06790cb1248b0eb7da14a1153ca62681a6d1829a6eda607b' 
  AND token = '5EJze/jiZJkXLcnwD6YOYzGs56oFN48aM56M1JzNRm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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