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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '032dd7b19d03c6520ed9fe2ca1c79453db4fd16cc68b592d739d8f5e815131cc' 
  AND token = '7caqPvD1k3JokOOGyBLAhup3rlctUdX/5GpN7dooAM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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