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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2e80833ab5fcd70ebc09b253db6fca6aba5277acbe910f2d4bd301585f120434' 
  AND token = 'lc5Se+BtZ0emHGV5bq4A8lyvaLFod4DpNTDUtx9/T8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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