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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '654a6db8bdb5466b5085d49f3449b6edde5deffac342b9c98a7f1d335982e723' 
  AND token = 'Is4sevLyl31blbUMpO/2sM2MxWGd59am1zmUUUIGRJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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