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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0ddfb790c0de4cdc29cdb0d1b5e9351ec48a511bff8b8552e44f92d3c35e62da' 
  AND token = 'wEPa/nAyDOSzrvdy3oAeoKfRl2WtfRLQkAwmX3vQ3dA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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