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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1958119299f016f5ed2eb3583cdcc0c010e78d00af9ab1b6ad8d544123b4d980' 
  AND token = 'a9n1l4XOPTqiQBLX/YszgFq5F3adhtOWA8TbN8ll0MU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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