Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1934cdae1d1eb3b95a88d4d3c49906d33038bf61466ba14689b2fa7b128b646' 
  AND token = '5JMkG6E6ML/KNicQdV3v67m1ZM9gNoBMat8gqzu1SdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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