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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9323de47913837c8887eac1d4812dff6ba495bc5f501e5821d2ffb08658ed1a2' 
  AND token = 'ZQwPm8O93EtUu76RyDo9DkwncsVMMg0HTe2W9OmsJgc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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