Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0bf12424947521148f2faafbfcdb80415aebec5ccbfff5584333558f93fb7b5' 
  AND token = 'eymhy6CYVp0pcTHbNe9DPTmLxgd8doolrk6MMCoVrYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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