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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e07a0f52bc1f44b8f1a1d35f6e98c623f92f91a2864e52cfe2aa1fb5d9de0a7' 
  AND token = 'E5qHPBkM9Py0ZdlGl4NDQoRbAcTd5X0q4y2I75UAqhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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