Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '563c5af1aa230517c1f3aae044841b5f650b8671bd38907c25007df0c230c5a8' 
  AND token = '8lwlw+tY8iJRpXU0m0LegxsZZHJZg62rI2QvGZnL0l0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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