Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4af490048a6b69c4c3da8def8262b8c3591d0aa0251298d3fc49ec343047b381' 
  AND token = 'gthRNIKIBighxlOsmiUPgVbw3Imi/iFtOw6R5e0LD3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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