Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5627ac9ac5ded48a4e7f794aa0fd58160bdbf653e6b7cebfd5a3e25b279aff62' 
  AND token = 'rq3Sp8dUbO3QIVU3yESkwgn7yuEn2Yx5ZxFEpLF6HBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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