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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7bb7ab572d8e1275012871c608e73846637595b1dba3dd172d52e577b7732665' 
  AND token = 'jAoDJx3KC16SqBRM1sjKxl3RtAp/pyKX7zmBNLTk/fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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