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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8e10c5073cc1053bd9c5a464733ca1eb3a95c17aec5684797d695c9ba29872c' 
  AND token = 'IHn8R1fKah+4ZqwyPo+32gSCXC/h902AnGwltqgQ49U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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