Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e0fdd8ce2d3646ee440573c91d3e231f2a69316ab9c2ed4a0d1629029f094d7' 
  AND token = 'Xc4bBlzzti809gx+FfAAnD3dYvjvanX98FH0SiiWtwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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