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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee2733fb7597868ccb32e1ffab08fe0a53d594715f7e62d859a95dec341ea581' 
  AND token = 'OgWEGVoD7Mm+duzgChsADBGREi7gXQiqb45OSrGzl6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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