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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1c9db67a52e51ea378565cc81eb3a3f3d89442dad26d8977f7c9fd3cf739d5e' 
  AND token = 'UUYYsF+IR/+LOwYi9io/EjVPfTi7RooRcG+eyetcX3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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