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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e602ad6ad6c95a6613a62e3546ec8974a33827f2799bc38fa11e236ecba8f63b' 
  AND token = 'zppfPjxpKz7kZZbegqdfFyRUm1qcSgCa/0ZydWU5Tao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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