Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0899351fa113cb2636d11af7b3c5ff8bb82c04d901e2c5b5db600fcc994305d8' 
  AND token = 'CLun5IeKConcg4yos/uy1hNo+Y3O+nwPXxk2PNaOPtg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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