Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbe4c0b409a67bdad93ffd02982200637b033ff56cfe97ed83acb52d76e174c0' 
  AND token = '/AjxwfdA4giMCGwP1plzMLQ8uI93nYZQPESGxzxOE5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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