Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3358b2ac17165c61859bf7746ebb5f07a63cf61e0b0e6ba01b9c5316103c9377' 
  AND token = 'jgVGYYkie6dITkeCtR+QKqsKkqscq8jvYRSyqnS9uJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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