Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d2e9fc7b5eb3ee3999cdd5b8291ec9034f3529572922e7504dbdb5f252aa7da' 
  AND token = '7oN15+0JtCe3je5vUKeCuaDc/6PxqaGXzumtD3hqGOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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