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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7adecce6ab77eb97bfeb425076c4445b1303a5cf6de47fa9d1c8b649638a914e' 
  AND token = 'wSy+ICCMjaSlu+UC5msE+yBf3l3DkBDi+RYB1vMFIiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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