Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61b4a36341b0c96676c87a9ca8cb64b2ad1d712d0e4b382b394c4683f7e3a71b' 
  AND token = 'zYt+EQ4I0GRMqni1thzQG67Btq6z+L5/G60RLxu/gpc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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