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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a01fe2d57f8d3014b3dba126932320db8255d95bbecc6d92f743b4176000e01' 
  AND token = 'N2CEoHmSrBsE8YD+3v5mt0TrVfuLFG5c9QWPXpvdj3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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