Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc01cdca9a7035ff7813c14ce443197f8ff573aa034a3cfcd4c543a7947f6fae' 
  AND token = 'SGBRWF+prZLkK7Igjs/DFuQM1NiH0pcTi9PeX/vL2+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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