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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc0d1cd60cced5b97edcfca638b132c55bba592bd5c6aa12ad5ddefd619cbf8e' 
  AND token = 'ImiSXmDlgiIp61SOs67pwPyoDKAvlDAsARHdCA4sIeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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