Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0befb254ce07c47cbc84b679e20a8e392e4b8307bdc626c870f2ef92b460ba83' 
  AND token = 'yYxJ7u5k41Fx0eUBSzKQM9TH+j7gPA79HX/5R/oKYGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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