Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8d8c62cc6e0df1f277afbd7b2ac5e5224a7e5440cdab056821eb990bb795b8a' 
  AND token = 'zH3AYdTJ0bP8GNro/0xJy7zOkmDeNUAFLLP9N8uPQow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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