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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06e4aee8b3facaf987bc1225edffe9c82f3fd2b1067686cab247692fb060a0ff' 
  AND token = 'AOrBIIvauBXZvzVDDAzmASp22TZk/lTX7ML9klCl90o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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