Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9c6c8e4e81ba8a174c3a96d11b48a48cfa6376a8043a8265f085198585e49c6' 
  AND token = 'VkLA3Yppu+iVtBShRfF3f7F+Yv5vGw8/QfLkOc0h7zs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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