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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '007bfcfec1221ac353f6ca034bc4e3e95286990d850151822c0b4fd92d2d1e16' 
  AND token = 'CNYA9jTHsAsSqzcIu1XSMMBNARX3jSXR/Kyo73Ds6Qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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