Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10cddfbf0a17fd974a1356249b327ba3de988b882b493de672bb17fb2f547c9a' 
  AND token = 'Jlhneb37tvffPl+l25vm2IP1/7kFFWfjzq67rNb/Ro4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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