Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0ba22804d14dfee1e564e9f4a3c12b5f949b78f3a93cfb66f2fdc917e41fa52' 
  AND token = 'UyDMwtNimFHSRwsL77U2LutiA4OwQVCHNIpKowNtDvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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