Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77abcf0748cf102e86a163df7b496bb614f7aa21a962f71f34d29025799e7b80' 
  AND token = '4vRLiRPAni5pakjBHro3DOc9IaTYzKwyFRx/F2WPTOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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