Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c923af1e5ecc4852c8d115faa45829c0fc617a754ae667fe498dcdcb7d45811f' 
  AND token = 'SLBo4kD3slT+8TYS5fyOnktvd1heYuBOI4MrTQJaCD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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