Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e133794c37185837431c47de8af3769f8831cf450ff65e59149368fac119c03e' 
  AND token = 'bdLqwzR91OEeryF2Zjg292mSOPSGAKJPPBloLabVn6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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