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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07063325e738661df2af1694474950f2a6b70385bbafd1fb6ad39f965767defb' 
  AND token = '2Bt1oSyVKh72HWT4f/HMJE0SxHUoSn4qQYI6X14CFuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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