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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de9916ec57f5e177500cd86f2a849cb33016a3eaf36f9064ea206f34bddb6050' 
  AND token = 'HIW5FY06YDbt41AYKDwg4ltLNSYPAI/94RNT1CwrCOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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