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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4decf6140ad7a7de7750c6b0436177e75344e136dfe9723e22a2b103d73e94a2' 
  AND token = 'jbdAxfpuA84WOb6dY7Tvdoj0dfmMt9ahLa+7K44K3Mo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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