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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aa5773f4da3961cc6fa38cf01a131719fcd4c83340b367e7e4285a2ce9dabe7' 
  AND token = 'Vuy8W/4RQ52jrtPprfmHGURKZgA4R/7FA86J95Uty+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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