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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '823e3cdda46e816ff4735b27915c96f0af658dba02f32810a63b351ddddc7951' 
  AND token = 'jB0I1KwcheUjsFGTU25uJJJzItbL7/IoTT0n3+zEFWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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