Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b955578db9baee18c1e5560980aced5cd6426b6b8cdb1cd88d6961a00715a93' 
  AND token = '+OGx3jWu1ZLc10P7Rvzi7G1l8sdxIKgSq2lSnSzYIbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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