Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56322e8e106df8ec3236d0d164801cca16bd58f6f8081fd1306c129f0c89c881' 
  AND token = '0kbDIsf2wlmuBNs/nAyFiqcAb9ihB8eq/vCJURcV5gg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00115

JSON explain

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