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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '033222899c4a3d8d686fc34539dda732b45ed79dac859b3f877767970f5747a7' 
  AND token = 'FXbYPe41LfkFzDqQr7OU9BAHDGT5j80crIap1IEoenI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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