Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65d1bf0847d0f6092648f04c2a9b4adf426c282063f8a38d162b8bd9697a30d8' 
  AND token = '6N9DCEVTW5LAMy4aOiLB1joa3yMRvnS/Q5P92MNTnjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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