Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8629dfb65a3187904af33c44f9d9cf617ef0b6f4e597783fafe33f06b134e446' 
  AND token = 'wyj0WPQL4LROM46F5pnAwjOPtvfkE3kAq1Ib5aSXUN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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