Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f60c246fe2ea496e947ca3bfe3eba74008545169da3b2836bac214e520dbe68f' 
  AND token = 'b2BOk4dkkfVhVMcxnzBLZ9PEEIib4jqiK/2qfSj9U94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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