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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85eb9b8ae05d3728c601f28baa90476938fe9ab3119fcf030245e6117817b123' 
  AND token = 'UVn7iNxkIfWn/etSDyqJrpg452TgxPZFwb/GOL46N38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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