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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09c0c1732c17b589563bda1c424c4c1bf6484024d4dc4833d434ba75652062cc' 
  AND token = 'bXGDQcgs74WLbsJ7GzqWQe3KpXFgLc7N4XUU/Lfih0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00080

JSON explain

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