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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb00091e73acb40d661c7969b6eb8bb21c689f54d50e8c4622c390d8c9953f4d' 
  AND token = 'a53joJ27pgeP9T72e4hhAK/oL05EO1uqeo54/01s2Ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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