Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f05c9a22aa2aa22445414784a0a9d8c7f197ee06ca8e1933b53062e23172f15' 
  AND token = 'rEDrzoK2lD1mdpRrXIdRPETiMzdfCICZfY2JpwkuwwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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