Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c62db2d4fc432b60c333f79873bb0781cc833db171a5cbab15ce949120c9ae04' 
  AND token = 'CjtT3SUm2K6SOxdlhE94kliLlejLnmtX0HKN3T2oIQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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