Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b10b260e8a7ec33d4f7594056900e791e4258fad8642193e3f245a4742b27ba' 
  AND token = 'aBW9RTSAy9S78KzDGUNv8RukB2Iv2GkFIj9OMDftBNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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