Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cadc0adbcd76cf303c3bc89e76d065917aa3272f2e250a589a1ee01d02f30331' 
  AND token = '2mi3J0SL9PE5R+8Evi7RPKpFSK48YQF+SnO6qTuueEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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