Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8c29b832bc9f8e2d120cf855934e3d372f17e7905606e6f1223c1d597b91eba' 
  AND token = 'Avfbme/oWUVvlCI44Ov4NA7yrOH/f274Li6+QKMYWlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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