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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '146918bc77bf1de4e8afcbe271fa2bc89c14c24cee2b911c334711424ea5014c' 
  AND token = 'rODcYUm2yhgk0W7EW2blAzzcHMA2zFZzx46HruY/1Kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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