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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b891902e527525d3f120b4b8d3cf0f48b8d84cbab63a832a0f1bbe6914cd5b9' 
  AND token = 'sXFKmvHwpDbdT9pC2BUtTiwCSRUU6WPD0H9oCmlU2+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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