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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bc2ff8a1002eb894069dd7254db036203c725c83ba2ba5b69967fafe964815c' 
  AND token = 'n/sn7paxR11cGAsbeK2Fb7l5uoTuSlFZ9pPYkcSbH1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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