Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2691aab15d9adddfcc1e86502989b6b513ec7876dae75f172595a8b8148d8cd' 
  AND token = 'lHuacir646AJeCmmSr1zlpsmjS6sOQ+uDO7kiaux1+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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