Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdc82709c51ce0f9fb8593df68b160805e1c4854aed12a6494668e6456f9a205' 
  AND token = 'nRMMpCiqjh/jgm7/+rDs3V2XXbiWEzMkdRoXFXizndA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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