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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0da863042942bc6c30ac8520db4158cad06297a2bd48c7b47b8ad70c26341ab9' 
  AND token = 'l3XUR1KbA+uFhfwtxsubz1h3II5WjEYPcX1TtdIad4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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