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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7419c379e135c7193432231427703a942bde462ec6ac37fbda2567a3974d93b0' 
  AND token = 'kl1XLUxkFH3mNSB13yFtAA11z/nnLNuO8Kbtm7ekueg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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